On (08/06/15 08:16), Julia Lawall wrote:
> > On (08/04/15 13:06), Brian Norris wrote:
> > > On Tue, Aug 04, 2015 at 08:46:30PM +0100, Salah Triki wrote:
> > > > kmem_cache_destroy can be called with NULL values. Thus, the checks that
> > > > precede the calls are useless.
> > >
> > > This isn't *currently* true. Only after a bit of work did I find that
> > > this is queued to change in the next release -- akpm has a patch:
> > >
> > > commit 3e54c0cd3abdca0cf91854278c8633fc7df6beb1
> > > Author: Sergey Senozhatsky <sergey.senozhat...@gmail.com>
> > > Date: Thu Jul 30 09:55:36 2015 +1000
> > >
> > > mm/slab_common: allow NULL cache pointer in kmem_cache_destroy()
> > >
> > > Please provide the appropriate context next time. And for the moment, I
> > > will
> > > not apply this, because this does not work on the current MTD development
> > > tree.
> > > Try your patch bomb on the next release, as it's not worth my time to
> > > cross-merge a -next branch just for a "cleanup".
> > >
> >
> > Julia already has a patch set to cleanup all the existing users
> > (not published yet, though).
> >
> > Apart from that, and this is more important, the patch in question
> > looks to me as 100% copy paste of a patch by Julia Lawall.
> >
> > https://lkml.org/lkml/2015/6/10/31
> >
> > And no, Salah, it's not "Signed-off-by: Salah Triki <salah.tr...@acm.org>".
> >
> > For the record, this is the second, let's say strange, patch from Salah
> > that I see today.
>
> I'm missing some context. As far as I can see, kmem_cache_destroy is
> updated in linux-next. So it seems like it could be OK to submit a patch
> to clean up the uses now. Does Salah's patch address all three functions:
> kmem_cache_destroy, mempool_destroy, and dma_pool_destroy?
>
no, just one that you already published.
all 3 functions are updated in -next, so you are welcome to send
your patch set.
-ss
> >
> > -ss
> >
> > > > Signed-off-by: Salah Triki <salah.tr...@acm.org>
> > > > ---
> > > > fs/jffs2/malloc.c | 27 +++++++++------------------
> > > > 1 file changed, 9 insertions(+), 18 deletions(-)
> > > >
> > > > diff --git a/fs/jffs2/malloc.c b/fs/jffs2/malloc.c
> > > > index b8fd651..ce11897 100644
> > > > --- a/fs/jffs2/malloc.c
> > > > +++ b/fs/jffs2/malloc.c
> > > > @@ -97,25 +97,16 @@ int __init jffs2_create_slab_caches(void)
> > > >
> > > > void jffs2_destroy_slab_caches(void)
> > > > {
> > > > - if(full_dnode_slab)
> > > > - kmem_cache_destroy(full_dnode_slab);
> > > > - if(raw_dirent_slab)
> > > > - kmem_cache_destroy(raw_dirent_slab);
> > > > - if(raw_inode_slab)
> > > > - kmem_cache_destroy(raw_inode_slab);
> > > > - if(tmp_dnode_info_slab)
> > > > - kmem_cache_destroy(tmp_dnode_info_slab);
> > > > - if(raw_node_ref_slab)
> > > > - kmem_cache_destroy(raw_node_ref_slab);
> > > > - if(node_frag_slab)
> > > > - kmem_cache_destroy(node_frag_slab);
> > > > - if(inode_cache_slab)
> > > > - kmem_cache_destroy(inode_cache_slab);
> > > > + kmem_cache_destroy(full_dnode_slab);
> > > > + kmem_cache_destroy(raw_dirent_slab);
> > > > + kmem_cache_destroy(raw_inode_slab);
> > > > + kmem_cache_destroy(tmp_dnode_info_slab);
> > > > + kmem_cache_destroy(raw_node_ref_slab);
> > > > + kmem_cache_destroy(node_frag_slab);
> > > > + kmem_cache_destroy(inode_cache_slab);
> > > > #ifdef CONFIG_JFFS2_FS_XATTR
> > > > - if (xattr_datum_cache)
> > > > - kmem_cache_destroy(xattr_datum_cache);
> > > > - if (xattr_ref_cache)
> > > > - kmem_cache_destroy(xattr_ref_cache);
> > > > + kmem_cache_destroy(xattr_datum_cache);
> > > > + kmem_cache_destroy(xattr_ref_cache);
> > > > #endif
> > > > }
> > > >
> > > > --
> > > > 1.9.1
> > > >
> > > >
> > > > ______________________________________________________
> > > > Linux MTD discussion mailing list
> > > > http://lists.infradead.org/mailman/listinfo/linux-mtd/
> > >
> >
>
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